The joke may be on you.  With all due respect, you made 3 mistakes.  You answered. You called back.  You think you tied them up but they know that gag.  If you engage these callers, they will keep calling, and share your number with their scummy friends.
If you want engage, you may as well make it count - keep records of all calls and try to get the info you need for a TCPA or similar lawsuit. That will not be easy, since you need an actual location, not some UPS Mail drop or a city in India.  If can get the info you need, get to court and start pressing them